Conference telephone device



FIG. 1 is a first perspective view of a conference telephone device;

FIG. 2 is a second perspective view of a conference telephone device;

FIG. 3 is a front elevational view of the device of FIG. 1;

FIG. 4 is a rear elevational view of the device of FIG. 1;

FIG. 5 is a left side elevational view of the device of FIG. 1;

FIG. 6 is a right side elevational view of the device of FIG. 1;

FIG. 7 is a top plan view of the device of FIG. 1; and,

FIG. 8 is a bottom plan view of the device of FIG. 1. 

CLAIM The ornamental design for a conference telephone device, as shown and described. 